OptMD (Optimax Media Delivery) is an ad server that delivers online advertisements to many of the websites you visit online. As part of this process, OptMD places a cookie on your computer.

A cookie is a small text file stored in your browser that helps to make advertising more effective and in the process keep the content on thousands of websites free of charge. OptMD uses cookies to control things like the number of ads you see, the number of times an ad is clicked and the relevance of ads displayed to you.